Question

If the mean of 8 no. Of students is 25.if 5is subtracted from each no.,what will be the new mean

Answer 1

If 5 is subtracted from each number, The new mean will be 5 less.
Or new mean = 25 - 5 = 20

Answer 2

Mean of 8 is 25.
5 is subtracted from each number.
Then, if x is the mean, new mean is x-5.
Here, new mean=25-5=20.
Eg:-   10,15,20,25,30.
mean=100/5=20.
5 gets subtracted from all.
5,10,15,20,25.
New mean=75/5=15.

Therefore, for ur question, the new mean is, 25-5=20.

Thank you.
Hope this will help you.